package com.yangtao.framework.util;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

/**
 * @auther: 杨涛
 * Date: 11-4-22
 * Time: 下午2:03
 * @version: 1.0
 */
public class MD5Util {
	private String inStr;
	private static MessageDigest md5;

	static {
		try {
			md5 = MessageDigest.getInstance("MD5");
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
		}
	}

	/*下面是关键的md5算法*/
	public static String compute(String inStr) {
		char[] charArray = inStr.toCharArray();
		byte[] byteArray = new byte[charArray.length];
		for (int i = 0; i < charArray.length; i++)
			byteArray[i] = (byte) charArray[i];
		byte[] md5Bytes = md5.digest(byteArray);
		StringBuffer hexValue = new StringBuffer();
		for (int i = 0; i < md5Bytes.length; i++) {
			int val = ((int) md5Bytes[i]) & 0xff;
			if (val < 16) hexValue.append("0");
			hexValue.append(Integer.toHexString(val));
		}
		return hexValue.toString();
	}
}
